. >> the reason why we called jon is because we knew he knew about the economy. >> narrator: by 2008, corzine had become a trusted advisor to barack obama. it was once rumored that he might even replace tim geithner as treasury secretary. >> here we go, folks. >> narrator: but then in 2010, new jersey voters ended his political career and returned him to wall street. >> former new jersey governor jon corzine is returning to the private sector. he has taken the helm of mf global. >> narrator: but corzine's choice of mf global was puzzling. >> i think it was a little surprising that he went to such a small firm. you know, if you think about it, goldman partner, goldman ceo, confidante of the president of the united states, former new jersey governor, senator. why wasn't he running a bigger firm, i guess, is the real question. >> 99% of people would look at his résumé and say, "i was a senior partner at goldman sachs, i was the governor of new jersey, i'm past 60, over and out, i'm going to go have fun." but he looks at his résumé and says, "i was kicked out of goldman sachs. i was k